Ahlfors dealt in 1985 with Möbius transformations in the quaternions using matrices with quaternionic entries. The author calls such a transformation parabolic
if the norms of its right eigenvalues are 1 and is has exactly one fixed point in
with the hyperbolic 5-space H
. A transformation is called loxodromic if the norm of one of its right eigenvalues is bigger than 1. And at last, it is called elliptic if the norms of its right eigenvalues are 1 and it has at least two fixed points. Then the Möbius transformations are classified by conditions for the coefficient matrices which are too technical to be cited here. Some examples are given.